Sunspot drawing of 1987-8-13

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https://doi.org/10.7891/e-manuscripta-142817



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1987-08-13
07:45
Hs 1304.6:1985
https://doi.org/10.7891/e-manuscripta-142817
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
80 15 22 D -26 284
82 4 16 D -30 249
83 6 15 D -23 239
3 25 53